Those of us who have taken to technology to aid us in our navigation and record GPS tracklogs and stats for the routes that we enjoy can now use either a standalone GPS unit or a mobile phone with a GPS app.
However anyone who has used both to record details of a walk will know that the data recorded (for example distance and ascent) is never the same even when used side-by-side on the same walk. We are often asked what it is about GPS that makes this happen?
Well, a GPS is made up of many things including an aerial to receive the signal from the satellites, a chip to process the data once received and then the software to calculate and record position.
Imagine a portable radio as an analogy; they are all designed for receiving the same signal, but the quality of aerial and electronics in your radio makes a huge difference as to whether it will pick up the broadcast and the quality of sound you’ll hear. Similarly every GPS is capable of receiving the same satellite signals but those with better aerials will receive more satellite signals and the more you can receive the more accurate your position.
A good standalone GPS unit will generally have a better aerial and better processing, but mobiles are catching up fast and try different mobile apps to see if the app itself makes a difference. Of course we’d recommend that the Memory-Map app is the first one you should test…so try a FREE Test Drive and compare stats with your own or a friends GPS next time you go for a walk.
We’d love to hear your results!